JP6231439B2 - Air curtain device - Google Patents

Description

  The present invention relates to an air curtain device, and more particularly to an air curtain device that forms an air curtain between a particle scattering area where fine particles are scattered and an intrusion prevention area where particles should be prevented from entering from the particle scattering area.

  Conventionally, in this type of air curtain device, as seen in, for example, Patent Document 1, air curtain airflow having a uniform wind speed in the air curtain thickness direction (in other words, a substantially single air curtain airflow) is scattered. Between the area and the intrusion prevention area.

JP 2009-186040 A

  However, in the conventional air curtain device described above, in order to sufficiently prevent the invasion of particles from the particle scattering region to the intrusion prevention region, the air curtain air flow velocity (air flow velocity) is increased and the thickness of the air curtain air flow is increased. For this reason, there is a problem that the amount of air blown out from the air outlet for forming the air curtain is increased, which increases the operating cost and the equipment cost.

  In view of this situation, the main problem of the present invention is to effectively prevent particle intrusion from the particle scattering area into the intrusion prevention area while adopting a rational air flow form, while the operation cost and equipment cost are low. An object of the present invention is to provide an air curtain device that can be used.

The first characteristic configuration of the present invention relates to an air curtain device,
An air curtain device that forms an air curtain between a particle scattering area where fine particles are scattered and an intrusion prevention area where particles should be prevented from entering from the particle scattering area,
To make a configuration in which a high-speed air curtain airflow that travels on the side of the particle scattering region at a high speed and a low-speed air curtain airflow that travels on the side of the intrusion prevention region at a low speed are translated in an adjacent state .
An airflow guide plate having an inclined posture in which the upstream edge is located on the side of the intrusion prevention area relative to the downstream edge is provided at the airflow outlet for forming the air curtain,
The blowout airflow from the airflow outlet is divided into the high-speed air curtain airflow and the low-speed air curtain airflow by the airflow guide plate .

  According to this configuration, in the translation of the high-speed air curtain airflow and the low-speed air curtain airflow, the induced flow having a velocity component from the low-speed air curtain airflow side to the high-speed air curtain airflow side due to the difference in the wind speed (that is, An induced flow having a velocity component from the intrusion prevention area side to the particle scattering area side can be generated.

In addition, this induced flow differs from the induced flow that occurs when the gas in the particle scattering area and the intrusion prevention area is directly attracted to the high-speed air curtain airflow, and from the air outlet for air curtain formation, similar to the high-speed air curtain airflow. blowing wind components since one having basically the even attenuation of the high-speed air curtain air flow accompanying the attraction requires only small.

  From these facts, according to the above configuration, a single air curtain air flow (that is, a conventional air curtain air flow that is equal to the total air flow of the high-speed air curtain air flow and the low-speed air curtain air flow and the air speed is uniform in the air curtain thickness direction). Compared to the generation of curtain airflow, particle intrusion from the particle scattering area to the intrusion prevention area can be more effectively prevented, and the total blown air volume can be reduced by that amount to reduce the operating and equipment costs. It can be made cheap.

In the above first characteristic configuration,
In order to translate the high-speed air curtain airflow and the low-speed air curtain airflow in an adjacent state,
An airflow guide plate having an inclined posture in which the upstream edge is located on the side of the intrusion prevention area relative to the downstream edge is provided at the airflow outlet for forming the air curtain,
Since the blowout airflow from the airflow outlet is divided into the high-speed air curtain airflow and the low-speed air curtain airflow by the airflow guide plate , the following effects are also achieved.

  According to this configuration, a high-speed air curtain airflow and a low-speed air curtain airflow can be formed simply by providing an airflow guide plate at the airflow outlet for forming the air curtain, and the air curtain airflow can be translated. Thus, the equipment cost can be further reduced as compared with providing two types of air curtain outlets for forming the air curtain airflow.

The second feature configuration of the present invention specifies an embodiment suitable for the implementation of the first feature configuration.
A wind speed ratio adjusting unit is provided for adjusting a wind speed ratio between the high-speed air curtain airflow and the low-speed air curtain airflow by adjusting an inclination angle of the airflow guide plate.

  According to this configuration, the airflow ratio adjusting unit adjusts the inclination angle of the airflow guide plate to split the airflow blown from the common air curtain forming airflow outlet (that is, the high-speed air curtain airflow and the low-speed air curtain airflow). Adjusting the wind speed ratio between the high-speed air curtain airflow and the low-speed air curtain airflow.

  And by this wind speed ratio adjustment, it is possible to easily obtain a situation where the particle intrusion from the particle scattering area to the intrusion prevention area can be most effectively prevented.

As a comparative arrangement for the present invention is considered the high-speed air curtain stream also Rukoto provided a low-speed side of the airflow outlet for blowing high-speed side of the air flow outlet and said low-speed air curtain airflow adjacencies blowing.

In this comparative configuration, the high-speed air curtain airflow and the low-speed air curtain airflow can be smoothly and satisfactorily blown out without mutual interference when they are blown out. The desired effect due to the curtain airflow can be obtained more effectively and reliably.

Further, Rukoto in this comparison arrangement, the wind speed ratio adjustment unit for adjusting the wind speed ratio of the low-speed air curtain airflow blown to the high-speed air curtain air flow blown from the air flow outlet of the high-speed side from the low-speed side of the air flow outlet provided Is also possible.

In that case, a situation where the particle intrusion from the particle scattering area to the intrusion prevention area can be most effectively prevented by adjusting the wind speed ratio by the wind speed ratio adjusting unit can be easily obtained.

The third characteristic configuration of the present invention specifies an embodiment suitable for the implementation of the first or second characteristic configuration described above .
The spray area of the object to be coated is the particle scattering area, and the area facing the inner surface of the side wall of the coating area is the intrusion prevention area, and the low-speed air is kept along the inner surface of the side wall. The curtain airflow and the high-speed air curtain airflow are configured to translate.

  According to this configuration, it is possible to effectively prevent the paint mist scattered in the painting area from adhering to the inner surface of the side wall of the painting area by the high-speed air curtain airflow and the low-speed air curtain airflow.

Front view of painting booth II-II arrow view in FIG. III-III arrow view in FIG. Enlarged sectional view of the holder Enlarged sectional view showing the connection structure between the arm tip and the holder Schematic diagram showing the airflow state of the air curtain Front view of painting booth showing another embodiment VIII-VIII arrow view in FIG. IX-IX arrow view in FIG. Front view of painting booth showing another embodiment XI-XI line view in FIG. XII-XII line arrow view in FIG. Front view of painting booth showing another embodiment Schematic of the holder showing another alternative embodiment Front view of spraying means support structure showing another embodiment The schematic diagram of the air curtain formation form which shows the comparison structure with respect to this invention

  1 to 3 show a painting booth 1 for painting an object W (in this example, an automobile bumper). In this painting booth 1, for example, four painting areas 2 (= 2a to 2d) are arranged in a line. The objects W are arranged and the objects to be coated W are sequentially coated in these coating areas 2.

  For example, in the first painting area 2a, primer coating is applied to the workpiece W, in the second coating area 2b, No. 1 base coating is applied to the coating object W after primer coating, and in the third coating area 2c, Apply the No. 2 base coating to the workpiece W after the No. 1 base coating.

  And in the 4th coating area 2d, clear coating is given to the to-be-coated object W after No. 2 base coating, and the to-be-coated object W which these coating complete | finished is sent to the drying furnace 3, and is baked and dried.

  On the upper part of each coating area 2, spray means 4 for spraying a predetermined paint onto the article W is arranged in a substantially vertical downward posture.

  On one side of these painting areas 2, robot installation areas 5 adjacent to the respective painting areas 2 are arranged side by side in the painting area alignment direction, and each robot installation area 5 has a corresponding painting area. 2, a painting robot 6 for performing painting work is installed.

  Two coating areas 2 adjacent to each other include a preceding coating area 2 ′ located on the upper side in the traveling direction of the article W and a subsequent painting area 2 ″ located on the lower side in the traveling direction of the article W. Are in a relationship.

  Specifically, the first painting area 2a is the preceding painting area 2 ', while the second painting area 2b is the following painting area 2 ", and the second painting area 2b is the preceding painting area 2'. On the other hand, the third painting area 2c is a subsequent painting area 2 ″, the third painting area 2c is a preceding painting area 2 ′, and the fourth painting area 2d is a following painting area 2 ″.

  The relationship between the preceding and following is the same for each of the spraying means 4, the robot installation area 5, and the painting robot 6.

  In each coating area 2, the workpiece W is held by being connected to the tip 7 a of the arm 7 in each coating robot 6 via a branch-shaped holder 8.

  As shown in FIG. 4, the holder 8 is provided with a plurality of suction cups 9 for adsorbing to the workpiece W as a fixture / object connection means for connecting the holder 8 to the workpiece W. is there.

  These suction cups 9 are arranged so as to correspond to a plurality of connection target locations in the article W to be coated (in this example, a total of four locations of the back surface locations of both end portions of the bumper front portion and the back surface locations of the bumper both side portions). Is provided on the holder 8.

  The holder 8 is formed of a pipe material, and the internal hole (pipe hole) of the pipe material is a suction path 10 for sucking the internal air of the suction cup 9 by suction means (not shown). By sucking the internal air of the suction cup 9 through the suction means, the suction cup 9 is adsorbed to the workpiece W, whereby the holder 8 is connected to the workpiece W.

  The suction path 10 includes a main suction path 10b connected to a suction port 10a that connects the suction means, and a branched suction path 10c that branches from the main suction path 10b and opens into the suction cups 9.

  In the main suction path 10b, an air flow from the inside of each suction cup 9 toward the suction port 10a (that is, air suction by suction means connected to the suction port 10a) is allowed, and a reverse air flow (that is, the suction port 10a). A check valve 11 of a ball type or the like that shuts off the air flow from the air to the inside of each suction cup 9 is provided.

  In other words, after the suction cups 9 are adsorbed to the workpiece W by air suction by the suction means, the check valve 11 causes a backflow of air (in other words, even in a state where the suction means is separated from the suction port 10a). By preventing the suction cups 9 from being released into the atmosphere, the suction state of the suction cups 9 with respect to the workpiece W is maintained, and the connection state between the holder 8 and the workpiece W is maintained.

  In addition, the holder 8 is provided with a cover 12 for each suction cup 9, and when the suction cup 9 is in a non-adsorbed state, the tip suction portion of the suction cup 9 is separated from the surrounding area of the cover 12. When the suction cup 9 protrudes and contracts in the suction state, the tip suction portion of the suction cup 9 is configured to be retracted toward the inside of the enclosed area of the cover 12.

  That is, by providing this cover 12, while adsorbing the suction cup 9 to the workpiece W is allowed, it is possible to effectively prevent the excessive spray paint from adhering to the suction cup 9.

  On the other hand, as an arm / holding tool connecting means for connecting the arm tip 7a of each painting robot 6 to the holder 8, a connecting hole 13 is provided in the arm tip 7a of each painting robot 6, as shown in FIG. And the convex part 14 for a connection inserted and fitted with respect to this connection hole 13 is formed in the holder 8. FIG.

  The connecting hole 13 of each arm tip 7a has a straight hole portion 13a having a cylindrical inner peripheral surface, and a tapered inlet portion 13b having a conical tapered inner peripheral surface whose diameter increases toward the hole inlet side. Are formed in a concentric arrangement.

  On the other hand, the connecting convex portion 14 of the holder 8 has a columnar tip portion 14 a that fits in the straight hole portion 13 a of the connecting hole 13 and a taper that fits in the tapered inlet portion 13 b of the connecting hole 13. The stepped portion 14b is formed in a concentric arrangement.

  That is, when the connecting convex portion 14 of the holding tool 8 is inserted and fitted into the connecting hole 13 of each arm tip portion 7 a, the columnar tip portion 14 a of the connecting convex portion 14 is tapered to the connecting hole 13. The connecting convex portion 14 is smoothly guided to the center of the connecting hole 13 by being brought into sliding contact with the tapered inner peripheral surface of the inlet 13b.

  And in the state which completed this insertion fitting, the cylindrical outer peripheral surface in the columnar front-end | tip part 14a of the convex part 14 for a connection is surface-contacting with respect to the cylindrical inner peripheral surface in the straight hole part 13a of the hole 13 for a connection. And the tapered outer peripheral surface of the tapered step portion 14b of the connecting convex portion 14 is brought into surface contact with the tapered inner peripheral surface of the tapered inlet portion 13b of the connecting hole 13, thereby The arm tip 7a of each painting robot 6 is securely connected to the holder 8 with high connection accuracy.

  In addition, the suction port 10a of the suction path 10 in the holder 8 is opened to the connecting joint surface between the arm tip 7a and the holder 8 (specifically, the tip surface of the connecting convex portion 14).

  The connecting hole 13 of each arm tip 7a is provided with a permanent magnet 15 for attracting the connecting convex portion 14 of the holder 8 inserted and fitted into the connecting hole 13, and the connecting hole. An arm-side suction path 16 that exerts an air suction force is opened between 13 and the connecting convex portion 14 inserted and fitted thereto.

  That is, the insertion fitting state of the connecting hole 13 and the connecting convex portion 14 is maintained by the magnetic force generated by the permanent magnets 15 and the air suction force applied through the arm-side suction path 16. The connection state between the arm tip 7a of the painting robot 6 and the holder 8 is maintained.

  In addition to the arm side suction path 16 for connecting the holding tool, the arm tip 7a of each painting robot 6 is opened to the inner surface of the connecting hole 13 which is a connecting joint surface between the arm tip 7a and the holding tool 8. Thus, the detection air passage 17 is formed in a closed state by the connection between the arm tip 7a and the holder 8 (that is, the insertion fitting of the connecting projection 14 to the connecting hole 13).

  Further, each coating robot 6 is provided with a pressure applying means (not shown) for applying a predetermined positive pressure by supplying compressed air to the detection air passage 17 which is closed by the connection between the arm tip 7a and the holder 8. And a pressure detecting means 18 for detecting the air pressure in the detection air passage 17 is provided.

  That is, because the workpiece W or the holding tool 8 collides with another object, an abnormality occurs in the connection state between each arm tip 7a of each coating robot 6 and the holding tool 8, or abnormal external force is applied to the holding tool 8. When the detection air passage 17 is opened, the applied positive pressure of the detection air passage 17 is decreased, and the decrease in the applied positive pressure is detected by the pressure detection means 18, thereby Detect abnormalities and abnormal external forces.

  When an abnormality is detected by the pressure detection means 18, the control means 19 executes a predetermined security process such as urgently stopping the operation of each painting robot 6 or issuing an alarm.

  Note that a ring-shaped sealing material (not shown) surrounding the opening is attached to the opening of the detection air passage 17 on the inner surface of the connection hole 13, and the arm-side suction passage 16 passes through this sealing material. The region where the air suction force is applied is separated from the region where the positive pressure is applied through the detection air passage 17.

  The control means 19 automatically operates each painting robot 6 in accordance with a preset operation program. In each painting area 2, the arm tip 7a of each painting robot 6 is held via the holder 8 as described above. In a state where the objects to be coated W are connected, the objects to be coated W are applied by spraying downward from the spraying means 4 while the objects to be coated W are displaced with respect to the spraying means 4 by the automatic operation of the coating robot 6.

  Further, in this painting, the control means 19 changes the posture of the article W so that the surface to be coated at each time point on the article W is maintained substantially perpendicular to the direction of spraying the paint from the spray means 4. However, the configuration is such that the workpiece W is displaced relative to the spray means 4.

  Between the respective painting robots 6 at the boundary between the adjacent robot installation areas 5, a delivery section 20 is provided between the adjacent painting robots 6 to deliver the object W to be coated. The article W to be coated is sent to the subsequent painting area 2 ″ through the delivery unit 20.

  Specifically, the control means 19 performs the preceding painting robot 6 'and the subsequent painting robot by moving the workpiece W together with the holder 8 together with the holder 8 after the completion of the preceding painting in the preceding painting area 2'. In the state where the workpiece W and the holder 8 are kept connected while being held by the delivery section 20 between 6 ″, the connection between the arm tip 7a of the preceding coating robot 6 ′ and the holder 8 is maintained. Is released.

  Then, after the arm tip portion 7a of the preceding painting robot 6 'is moved away from the delivery unit 20, the arm tip portion 7a of the following coating robot 6 "is moved to the object W by the operation of the following coating robot 6". In the state where the connection is maintained, it is connected to the holding tool 8 held by the delivery unit 20, and then the subsequent painting is performed in the subsequent painting area 2 ″.

  It should be noted that the arm tip 7a of each coating robot 6 is connected to the arm through the connecting hole 13 against the magnetic force of the permanent magnet 15 in a state where air suction through the arm suction path 16 for connecting the holding tool is stopped. A connection releasing means (not shown) for releasing the connection between the arm tip 7a and the holder 8 by separating the convex portion 14 is provided.

  That is, the control means 19 stops air suction through the arm-side suction path 16 and automatically operates the connection release means, so that the arm tip portion 7a of the preceding painting robot 6 ′ and the holding tool 8 are automatically operated in the delivery section 20. Disconnect from the link.

  The workpiece W to be carried into the first painting area 2a is held by the carrying section 21 in the vicinity of the first painting area 2a in a state where the holding tool 8 is connected in advance by an operator or another robot. By the operation of the painting robot 6 for one painting area 2a, the arm tip 7a of the painting robot 6 is connected to the holding tool 8 held by the carry-in portion 21 in a state where the connection with the article W is maintained. Subsequently, the process proceeds to painting in the first painting area 2a.

  Further, the workpiece W that has finished painting in the final fourth coating area 2d is moved to the transport carriage 22 in the vicinity of the fourth coating area 2d by the operation of the coating robot 6 for the fourth coating area 2d together with the holder 8. After placing, the connection between the arm tip 7a of the coating robot 6 and the holding tool 8 is released, and then, it is sent to the drying furnace 3 together with the holding tool 8 and the transport carriage 22.

  At this time, the coating object W is softened by the thermal environment in the drying furnace 3, whereas the suction pressure of the suction cup adsorption site in the coating object W is released by releasing the internal negative pressure of each suction cup 9 in the holder 8 to the atmosphere. Prevent deformation. (Note that, depending on the case, this atmospheric release can prevent abnormal shrinkage of the suction cup 9 in the drying furnace 3).

  A partition wall 24 is provided between each painting area 2 and each corresponding robot installation area 5 corresponding thereto, and an arm 7 of the painting robot 6 installed in the robot installation area 5 is correspondingly painted on this partition wall 24. A work opening 24 a extending to the region 2 is formed.

  In addition, an air supply chamber 26 for the robot installation area that receives ventilation air sa supplied from an air conditioner (not shown) through the air supply path 25a for the robot installation area is provided in the ceiling pocket of each robot installation area 5. It is provided.

  An air supply port through which ventilation air sa received in the air supply chamber 26 for the robot installation area is blown out to each robot installation area 5 is formed in the ceiling of each robot installation area 5 that also serves as the lower wall of the air supply chamber 26. 27 is provided.

  On the other hand, a painting area air supply chamber 28 for receiving the ventilation air sb supplied from the air conditioner through the painting area air supply passage 25b is provided at the painting area side portion of the ceiling pocket in each robot installation area 5. It is provided.

  In addition, fresh ventilation air is supplied to one of the air supply chamber 28 for the painting area and the air supply chamber 26 for the robot installation area, and the other is recycled air in which the exhaust air from the painting area 2 is purified. May be supplied as ventilation air.

  When the same ventilation air (sa = sb) is supplied to the painting area 2 and the robot installation area 5, the painting area air supply path 25b and the robot installation area air supply path 25a are set to 1 In addition to the dual-purpose air supply path, the painting area supply chamber 28 and the robot installation area supply chamber 26 may be combined into a single combined supply chamber.

  In addition, two sock filters 29 (cylindrical filters) extending from the painting area air supply chamber 28 to one side wall 2w of each painting area 2 (the painting area side wall located opposite to the robot installation area 5) are provided. These sock filters 29 are arranged in a state in which the spraying means 4 is located at the center between the sock filters 29 in plan view.

  That is, for each paint zone 2, the ventilation air sb received in the air supply chamber 28 for the paint zone is supplied to the upper part of each paint zone 2 from these two sock filters 29.

  The upper side of the two sock filters 29 at the upper part of each painting area 2 has a duct width over almost the entire area of each painting area 2 in a plan view, and from one air supply chamber 28 for each painting area 2 to one side wall 2w of each painting area 2. A crossover duct 30 is provided which extends to the end.

  An air outlet 31 for forming an air curtain that forms an air curtain fa that flows downward along the one side wall 2 w of each painting area 2 is formed on the lower surface of the front end portion of the transition duct 30.

  That is, a part of the ventilation air sb received in the air supply chamber 28 for the painting area is discharged downward from the air outlet 31 for forming the air curtain through the crossing duct 30, so that one side wall 2 w of each painting area 2 is discharged. An air curtain fa flowing downward is formed.

  The air flow outlet 31 for forming the air curtain and the spray means 4 are arranged side by side in the alignment direction of the painting area 2 and the robot installation area 5 in plan view, and the air flow outlet for forming the air curtain. The width dimension d of 31 (in other words, the width dimension of the air curtain fa) is smaller than the width dimension of the coating area one side wall 2w and smaller than the separation dimension of the two sock filters 29.

  Below each painting area 2 is formed an exhaust area 32 for receiving air ea discharged downward from the painting area 2 in accordance with the air supply to the painting area 2 and the air supply to the corresponding robot installation area 5. The air ea received in the exhaust area 32 is exhausted through an exhaust path 33 by an exhaust fan (not shown).

  In addition, when the excessive spray paint contained in the exhaust air ea from the coating area 2 is dry-collected, the powdered collection auxiliary material is mixed with the exhaust air ea in the exhaust area 32, and the downstream side of the exhaust path 33. In this case, the excess spray paint may be collected by a filter together with the collection auxiliary material, and when the excess spray paint contained in the exhaust air ea from the coating area 2 is collected by a wet process, the excess spray paint is collected. A wet collection device may be disposed in the exhaust region 32.

  By discharging the air through the exhaust path 33, each robot installation area 5 is maintained at a higher pressure than the adjacent painting area 2, and is formed on the partition wall 24 between the robot installation area 5 and the corresponding painting area 2. A lateral or obliquely downward air flow ra that flows into the corresponding coating area 2 through the working opening 24a is formed, and the air flow ra suppresses scattering of excess spray paint toward the robot installation area 5 in each painting area 2. To do.

  In other words, in combination with the fact that the paint scattering is suppressed by the downward paint spraying by the spraying means 4, the spraying robot 6 suppresses the spraying of excess spray paint toward the robot installation area 5 by the air flow ra. In addition to the adhesion of the excessive spray paint to the main body portion, the adhesion of the excessive spray paint to the arm 7 of the coating robot 6 is effectively prevented.

  Further, by forming an air curtain fa that flows downward along one side wall 2w of each painting area 2, surplus spray paint toward the one side wall 2w of the painting area 2 is captured by the air curtain fa, thereby It also prevents the excessive spray paint from adhering to the one side wall 2w of the area 2.

  That is, by suppressing the paint scattering by the downward paint spraying by the spray means 4 as described above, the spread width of the surplus spray paint toward the one side wall 2w of the coating area 2 is also suppressed, so that the air curtain fa Even if the width dimension d is small, it is possible to effectively prevent the paint from adhering to the one side wall 2w of each coating area 2.

  Between the coating area 2 and the area facing the inner surface of the coating area one side wall 2w (that is, between the particle scattering area where the paint particles are scattered and the intrusion prevention area where particle intrusion should be prevented from the particle scattering area). In forming the air curtain fa, as shown in FIG. 6, the air curtain forming airflow outlet 31 is positioned at the middle portion in the thickness direction of the air curtain fa, and the upstream edge is relative to the downstream edge. In particular, an airflow guide plate 40 having an inclined posture close to the side wall 2w of the painting area is provided.

  That is, the airflow from the airflow outlet 31 is applied to the high-speed air curtain airflow fa1 that travels downward at high speed inside the coating area 2 that is the particle scattering area by the airflow guide plate 40 and the coating that is the intrusion prevention area. The one side wall 2w side is divided into a low-speed air curtain airflow fa2 that travels downward at a low speed, and these high-speed air curtain airflow fa1 and low-speed air curtain airflow fa2 are adjacent to each other along the inner surface of the painting-area one side wall 2 It is trying to translate with.

  That is, in the translation of the high-speed air curtain airflow fa1 and the low-speed air curtain airflow fa2, the airflow outlet has a velocity component from the low-speed air curtain airflow fa2 side to the high-speed air curtain airflow fa1 side due to the difference in wind speed between them. This causes an induced flow fa3 that also has a blown air velocity component from 31, thereby effectively preventing excess spray paint from penetrating from the paint zone 2 to the side of the paint zone one side wall 2a. Prevent paint adhesion to the inner surface.

  Adjacent paint areas 2 are separated by a partition wall 34, a hanging wall or an air curtain, so that the adjoining paint areas 2 are separated (ie, between the preceding paint area 2 'and the subsequent paint area 2 "). To prevent mutual movement of excess spray paint.

  In addition, the adjacent robot installation areas 5 are opened to each other in their arrangement direction, or even if they are partitioned, they are not separated by an air curtain, so that the adjacent painting robots 6 are separated (that is, the preceding painting robot 6 '). And the subsequent painting robot 6 ″), it is easy to deliver the workpiece W via the delivery unit 20.

[Another embodiment]
Next, another embodiment of the present invention will be listed.

  The delivery unit 20 that holds the workpiece W that is connected to the holder 8 is not limited to a configuration that holds the workpiece W and the holder 8 in a form in which the workpiece W and the holder 8 are placed thereon, and the workpiece W and the holder 8 are suspended. What hold | maintains in a lowered form etc. may be sufficient.

  In order to deliver the workpiece W between the painting robots 6, the preceding painting robot 6 ′ holds the article W after the preceding painting on the delivery unit 20, and then the subsequent painting robot 6 ″ delivers the delivery unit 20. In addition to the configuration in which the workpiece W held in the container is received prior to the subsequent coating, the preceding coating robot 6 'directly hands the workpiece W after the previous coating to the subsequent coating robot 6 ". May be.

  The spraying means 4 arranged at the upper part of the painting area 2 is not limited to spraying the paint vertically downward, but may spray the paint obliquely downward, and the spray direction of the paint is within the downward range. It may be changed.

  As the spraying means 4, a plurality of spraying means that are selectively used according to the type of the object to be coated W, the type of sprayed paint, and the like may be provided in the upper part of the coating area 2.

  About the air supply structure with respect to each coating area 2, you may make it the structure shown in FIGS.

  That is, the air curtain forming blow box 35 in which the air curtain forming air flow outlet 31 is formed on the lower surface is disposed on the upper portion of the one side wall 2 w in each coating region 2.

  Then, the two sock filters 29 extending from the air supply chamber 28 for the painting area are brought to the side surface of the air curtain forming blowing box 35, and the tip of the sock filter 29 is throttled, an air volume adjusting damper or the like. The air curtain forming blow box 35 is opened through the aperture mechanism 35a.

  That is, in this air supply structure, a part of the ventilation air sb received in the air supply chamber 28 for the painting area is supplied to the upper part of each painting area 2 from both the sock filters 29, so The other part of the ventilation air sb received in the air supply chamber 28 is supplied to the air curtain forming blow-out box 35 through both sock filters 29, whereby the air curtain forming air flow outlet 31 provided with the air flow guide plate 40. The high-speed air curtain air current fa1 and the low-speed air curtain air current fa2 are discharged in translation to form an air curtain fa along the one side wall 2w of the painting area 2.

  Moreover, you may make it the structure shown in FIGS. 10-12 about the air supply structure with respect to each coating area 2. FIG.

  That is, a paint tank installation chamber 36 that extends over the entire height of the paint zone 2 is formed at both corners of the one side wall 2 w in each paint zone 2, and the cross-sectional shape in plan view of these paint tank setup chambers 36 is one side wall in the paint zone 2. The triangular shape fits in the corners of both ends of 2w.

  The plane shape of the air curtain forming airflow outlet 31 (that is, the cross-sectional shape in plan view of the air curtain fa) is the bottom side in the triangular cross-sectional shape of the paint tank installation chamber 36 and the one side wall 2w of the coating area 2. A trapezoidal shape surrounded by

  That is, with this air supply structure, the air curtain fa prevents the excessive spray paint from adhering to the one side wall 2w of the paint area 2, and also causes the excessive spray paint to adhere to the chamber walls of both paint tank installation chambers 36. Can be prevented.

  In this case as well, the air curtain fa travels at a low speed on the side of the high-speed air curtain air current fa1 that travels at a high speed inside the coating area 2 that is a particle scattering area and on the side of the painting area one side wall 2w that is an intrusion prevention area. The low-speed air curtain airflow fa2 is preferably formed.

  Further, the air supply structure for each paint zone 2 may be configured as shown in FIG.

  That is, the lower wall 30a of the transition duct 30 provided in the upper part of each painting area 2 is formed into a porous structure 30a formed by a punching plate or a filter, thereby omitting the sock filter 29 and the lower wall porous structure of the transition duct 30. The ventilation air sb is blown out and supplied from 30a to the upper part of the painting area 2.

  Then, the airflow discharged from the airflow outlet 31 for forming the air curtain through the crossing duct 30 is divided into the high-speed air curtain airflow fa1 and the low-speed air curtain airflow fa2 by the airflow guide plate 40, whereby one side wall 2w of the painting area 2 Is formed along the air curtain fa.

  The painting robot 6 installed in the robot installation area 5 is not limited to the floor-mounted type, but may be of any installation type such as a wall-mounted type or a ceiling-suspended type.

  Various modifications can be made to the specific shape and structure of the holder 8 used to connect the arm tip 7a of the painting robot 6 to the workpiece W.

  Further, the specific structure of the arm / holding tool connecting means for connecting the arm tip 7a of the painting robot 6 to the holding tool 8, and the holding tool / workpiece connecting means for connecting the holding tool 8 to the work W The specific structure is not limited to that shown in the above-described embodiment, and various configuration changes can be made.

  In the above-described embodiment, an example in which the suction state of the suction cup 9 with respect to the workpiece W is maintained by blocking the air flow toward the inside of the suction cup 9 by the check valve 11 is described. As shown in FIG. 14, the on-off valve 23 may be interposed in the main suction path 10 b of the holder 8.

  That is, when the suction cup 9 is held in the attracted state with respect to the workpiece W, the opening / closing valve 23 is closed by a command by a wireless signal from the control means 19 and the internal air of the suction cup 9 is sucked by the suction means. When the suction cup 9 is attracted to the workpiece W, or when the suction cup 9 is released from the atmosphere by releasing the inside of the suction cup 9 to the atmosphere, the on-off valve 23 is wirelessly connected from the control means 19. The opening operation may be performed by a command by a signal or the like.

  In the above-described embodiment, the suction means (not shown) is connected to the suction port 10a of the suction path 10 only when the air inside the suction cup 9 is sucked to suck the suction cup 9 against the workpiece W. However, instead of this, the suction cup 9 is sucked by sucking the internal air of the suction cup 9 by using the air suction force applied through the arm suction path 16 that holds the connection state between the arm tip 7a and the holder 8. May be configured to be adsorbed to the workpiece W.

  The spraying means 4 may be arranged in the coating area 2 in a state where the raising / lowering operation is freely performed, so that maintenance of the spraying means 4 can be easily performed.

  In this case, for example, as shown in FIG. 15, the spray means 4 in the downward posture is attached to the swing end of the parallel link mechanism 37 that can swing up and down, and the parallel link mechanism 37 is moved to the ascending swing side. A biasing means 38 such as a weight for biasing may be provided, and a limit defining means 39 such as a buffer air cylinder for defining the swing range of the parallel link mechanism 37 may be provided.

  In other words, with this structure, the spraying means 4 is placed in a downward posture in the painting zone 2 by bringing the parallel link mechanism 37 up to the rising limit position defined by the limit defining means 39 in the normal state. The spraying means 4 can be sprayed onto the workpiece W in this state.

  On the other hand, at the time of maintenance work on the spraying means 4, the parallel link mechanism 37 is swung down to the lower limit position where the vertical downward posture is resisted against the biasing force of the biasing means 38, and the biasing means 38 is biased. By reversing the direction, the spraying means 4 can be held at the lower position of the painting area 2 in a downward posture, and maintenance work for the spraying means 4 can be performed in this state.

In each of the above-described embodiments, in order to form the high-speed air curtain airflow fa1 and the low-speed air curtain airflow fa2 that translate in the adjacent state, the airflow discharged from the airflow outlet 31 for forming the air curtain is increased by the airflow guide plate 40. showed formation forms shunted to the air curtain stream fa1 and slow air curtain stream fa2, other than the present invention, the air flow outlet structure forming a high-speed air curtain stream fa1 to translate adjacent state and a low-speed air curtain stream fa2 Various configuration changes are possible.

For example, as a comparative configuration for the present invention , as shown in FIG. 16, a high-speed air flow outlet 31a that blows out a high-speed air curtain air flow fa1 and a low-speed air flow outlet 31b that blows out a low-speed air curtain air flow fa2 are adjacent to each other. It is also conceivable to form both curtain airflows fa1 and fa2 separately .

  When the high-speed air curtain air flow fa1 and the low-speed air curtain air flow fa2 are formed by the air flow guide plate 40, by adjusting the inclination posture of the air flow guide plate 40, the wind speed ratio between the high-speed air curtain air flow fa1 and the low-speed air curtain air flow fa2 You may provide the wind speed ratio adjustment part which adjusts.

Further, in the case of the above comparative configuration in which the high-speed air curtain airflow fa1 and the low-speed air curtain airflow fa2 are formed by providing the high-speed airflow outlet 31a and the low-speed airflow outlet 31b adjacent to each other, as shown in FIG. Are provided with an air volume adjustment damper Va for adjusting the amount of air blown from the high-speed side air outlet 31a and an air volume adjustment damper Vb for adjusting the amount of air blown from the low-speed side air outlet 31b. It is also conceivable to adjust the wind speed ratio between the high-speed air curtain airflow fa1 and the low-speed air curtain airflow fa2 by adjusting the opening degree of each airflow adjustment damper Va, Vb using Vb as the airflow ratio adjustment unit .

  In the implementation of the present invention in which particle intrusion from the particle scattering area to the intrusion prevention area is prevented by the high-speed air curtain airflow fa1 and the low-speed air curtain airflow fa2 that translate in the adjacent state, the particle scattering area and the intrusion prevention area are the coating area. 2 is not limited to the area facing the inner surface of the coating area and one side wall 2w. For example, the present invention can be implemented in the form of a clean room as an intrusion prevention area and a front room for the clean room as a particle scattering area. You may implement.

  Further, the translational direction of the high-speed air curtain airflow fa1 and the low-speed air curtain airflow fa2 is not limited to the downward direction, and may be the horizontal direction or the upward direction.

  The fine particles to be prevented from entering are not limited to paint particles and dust, but may be any chemical substance or fungus.

  Further, the specific wind speed and thickness of each of the high-speed air curtain airflow fa1 and the low-speed air curtain airflow fa2 may be determined according to the type of particles to be prevented from entering.

  The air curtain device of the present invention can be used in various fields where it is necessary to prevent the invasion of particles from the particle scattering area to the intrusion prevention area.

2 Particle scattering area, painting area fa air curtain fa1 high-speed air curtain airflow fa2 low-speed air curtain airflow 31 airflow outlet 40 airflow guide plate

Claims (3)

An air curtain device that forms an air curtain between a particle scattering area where fine particles are scattered and an intrusion prevention area where particles should be prevented from entering from the particle scattering area,
To make a configuration in which a high-speed air curtain airflow that travels on the side of the particle scattering region at a high speed and a low-speed air curtain airflow that travels on the side of the intrusion prevention region at a low speed are translated in an adjacent state .
An airflow guide plate having an inclined posture in which the upstream edge is located on the side of the intrusion prevention area relative to the downstream edge is provided at the airflow outlet for forming the air curtain,
An air curtain device configured to divide a blown airflow from the airflow outlet into the high-speed air curtain airflow and the low-speed air curtain airflow by the airflow guide plate . The air curtain device according to claim 1, further comprising a wind speed ratio adjusting unit that adjusts an inclination angle of the air flow guide plate to adjust a wind speed ratio between the high-speed air curtain air flow and the low-speed air curtain air flow . The spray area of the object to be coated is the particle scattering area, and the area facing the inner surface of the side wall of the coating area is the intrusion prevention area, and the low-speed air is kept along the inner surface of the side wall. The air curtain device according to claim 1 or 2, wherein the curtain airflow and the high-speed air curtain airflow are translated .

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